Improvement in drop-hammers



. ZSheets--Sheet'h L. VIIA PMA N Drop-Hammers'.

Patented March 31, 1874. 57419:@

r Y W *Y z "-f um?? il" i zal l [Mm/eases.

if? @ff jfm# gr f l 2 Sheets--Sheet 2.4 L. GHAPMAN.

Drop-Hammers. A No. 149,277, Patented March 31,1874.

UNITED STATES LUKE CHAPMAN, OF COLLINSVILLE, CONNECTICUT, ASSIGNOR OF ONE-HALF PATENT OEEIoE.

HIS RIGHT TO WILLIAM J. W OOD, OF SAME PLACE.

IMPROVEMENT IN DROP-HAMMERS.

Specification forming part of Letters Patent No. 149,277, dated March 31, 1874; application filed v February 7, 1873.

To all whom it may concern I Be it known that I, LUKE CHAPMAN, of Collinsville, in the county of VHartford and State of Connecticut, have invented certain new and useful Improvements in Drops or Stamping- Machines, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure l is a front elevation of my improved drop, with the weight. down upon the anvil. Fig. 2 is afront elevation of the same, with the Weight elevated for a stroke. Fig. 3 is an elevation of the right side of the drop, with the weight down. Fig. et is an enlarged detached view of thefriction-wheels made use of, and the adjacent mechanism. Fig. 5 is a view of the weight in transverse vertical section through the center of the weight. Fig. 6 is a top view of the drop.

The letter a indicates the anvil-block sitting upon the foot al, with the standards a2 a3 rising therefrom. a4 is the anvil set in the anvilblock. b is the weight moving up and down on ways on the inner sides of the standards a2 a3. The` weight is pulled up by means of the ro'd c, which has an elastic attachment to the weight, as follows: On the lower end of the rod c is a collar or flange, c1, just fitting in a circular hole made .in the top of the weight. Under the end of the rod is placed a spring or packing, c2, and above the collar, and encircling the rod, is placed the spring or packing c3, bearing against the nut c4, which screws into the round hole in the weight, and through which runs the rod. This arrangement prevents the concussion of the weight from breaking or bending the lifting-rod. The letter c5 indicates the striking-face of the weight. On the top of the standards is hung the rotary shaft d, on which is the balance-wheel d1 and the pulley cl2, by which power is communicated to the drop. This shaft turns constantly in the direction indicated by the arrow. On this shaft is the friction-wheel da, the face of which is, by preference, corrugated, as shown in the drawings. If corrugated, the lifting-bar o is also correspondingly corrugated. On the top of the standards is also hung the cam-shaft e, having upon it the loose pulley e1, .having its face grooved out to fit against the lifting-bar c. To the cam-shaft eis attached the arm e2. When again rocked backward, so as to cause the upy ward movement of the rod e to stop.

The letter f indicates what I will call the mesh-rod,7 having ashort up-and-down move ment in the sockets f1 and f2. It also has a short rotary play. f3 is a spring tending to push the mesh-rod upward, and also to turn it around in the direction indicated by the arrow in Fig. 6. On the mesh-rod is a feather f4, and in the socket f1 is aspline-slot extending straight toward the front, through which the feather will slide upward when the mesh-rod is turned,

- so that the feather will extend toward the front,

and thus correspond in position with the splineslot. When the rod f is depressed and turned in any other position, the upper end of the feather will lock under the socket f1 and prevent the meshrod from springing upward. Just under the socket fl is a stop, f5, which prevents the feather from turning sidewise any farther than is suicient to allow the feather to lock under the socket. A spring e3 presses the a-rm e2 downward with force sufficient to make the pulley c1 press uponV the rod c and raise the weight. The spring' f 3is stron genough to overcome theforce ofthe spring e3, and when the rod f rises it pushes up against the arm e2, and thus throws the pulley el out of mesh, so that it will lose its hold on the rod c.

Vhen the weight b falls, just before it strikes on the anvil, the arm g, projecting from the weight, strikes upon the finger g1 projecting from the mesh-rod, thus pulling the mesh-rod down till the upper end of the feather]c4 comes below the socket f1, when the spring j'3 will throw the feather aroundsidewise against the stop f5, thus locking the mesh-rod from an upward movement. The spring e3 now comes into play, pressing down the arm c2 and throwing the loose pulley el, rod c, and friction-pulley d3 into mesh, thus causing the rod c and weight to rise. At the proper time the arm g strikes upon the n ger g2, throwing the mesh rod around so as to bring the feather frl under the spline-slot in the socket f1, when the spring f3 will push the mesh rod upward, and thus raise the end of the rock-lever e2, so as to throw the loose pulley lc1 out of mesh, causing the upward movement of the weight to cease. It will be observed that this unmeshing movement is sudden and almost instantaneous. rlhere is a spring-catch, t, attached to the standard a2, upon which catches and rests the weight when its upward movement ceases. The weight is released when a stroke is ydesired by the operator pressing his foot upon the treadle m, which is connected, by the link m1, to the cam-lever m2, which is pivoted to the outer end of the spring-catch t'. This pulls the catch outward, releasing the weight and giving a stroke, the weight being again elevated, as before.

rlhe distance to which the weight is elevated is regulated by the elevation of the finger g2 and the catch i. If the operator desires, for any reason, to give a short stroke of the weight, he can release the weight at any time during its upward movement by taking hold of the handle 0 and bringing the feather f4 under the spline-slot in the socket f1.

All that part of this drop which is set upon the top of the standards, commonly called the lifter can be detached from the standards and set upon overhead beams, as is often done in other drops.

I claim as my invention-n 1. The combination of the socket f1, having the spline-slot and the stop f5 just underneath, the mesh-rod f, having the feather f4 and the spring f3, the cam-shaft e, loose pulley c1, rocklever c2, spring c3, shaft d, friction-pulley d3, and lift-rod c, the whole constructed, arranged, and designed for operation and use, substantially as described.

2. The combination of the socket f1, having the spline-slot and the stop f5 just underneath, the mesh-rod f, having the feather f4 and the spring f3, the fingers g1 g2, and the arm q projecting from the weight, all substantially as described.

LUKE CHAPMAN.

Witnesses OLIVER F. PERRY, ALBERT L. Tnhvnn. 

